Battery-grid



F. A. POCOCK.

BATTERY GRID. APPLICATION FILED MAR.6.1915. RENEWED APR.26,19|9.

Patented Dec. 2, 1919.

FRANCIS A. Poc ocx, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO w. s. RUSSELL,

TRUSTEE, or CARLISLE, PENNsYLvANI I ammmm.

Specification of Letters Patent.

Application filed March 6, 191.5,Seria1 No. 12,552; Renewed April 26, 1919. Serial No. 293,017.

To all whom it mag concern: 1 7

Be it known that I, 'FRANcIs A. PocooK, a citizen of the United States,'res1d1ng at Philadelphia, in the county .of Philadelphia and State of Pennsylvanla, have invented certain new and useful Improvements in Battery-Grids, of which the following is a specification, reference being had therein to taken along the line 5-5 of Fig. ,1.

the accompanying drawing.

The objectof the invention is to provide an improved grid for storage batteries, especially those of the lead-lead type, having great strength and yet at the'sa ne time having a minimum volume and weight of meta and a maximum metallic surface. V

Of the accompanying drawing, Figure 1 is a side view of a grid embodyin the invention. A

ig. 2 is a sectional view taken along the line 22 ofFig. 1Q

Fig. 3 is a sectional view taken along the line 3-3 of Fig.1. j

Fig. 4 is a fragmentary sectional View line.4-4= of Fig. 2. T

taken along the o fragmentary sectional .view

Fig. 5 1s a Fig. 6 is a view showing one of the ele ments of one of the molds by means of which the grid shown in Figs. lto 5 may be cast.

Fig. 7 is a side view of a modified form of means of which the conductor terminal can be attached. As shown in Figs. 2 and 5, the

grid is provided with two side parts which are separated from each other. The two side parts are similar, but are oppositely faced so as to provide smooth outer surfaces. Each side part is checkered, the parallelograms which are provided being preferably rectangular, as shown. By referring to Fig. 1 it will be observed that each alternate parallelogram on each side part is entirely cut away to provide an aperture which is entirely unobstructed. The two side parts are leaving as casting space ,only the respectively out of transverse register with the apertured parallelograms of the other of A them. Each parallelogram other than those already described is occupied by'two-pairs of parallel bars 4, 4;. which intersect" each other near the corners of the (parallelogram;

Preferably the bars are s ace inward from the edges of the paralle ograms as clearly "shown in Fig. 1. Each bar ispreferably triangular in cross section, as indicated in Fig.

barred parallelogramhas, at the surface, only point contact with the'metal of the ditact there isrovided a transverse connector 5 which varies in cross section throughout its length from one side part to the other.

.As shown'in Fig.l2, eachconnector 5 is -we dge-shap ed alon fiand, as shown shaped along another transverse plane at v right angles to the first, the point of the second wedge, however, being on the opposite side from the point of the first wedge.

one transverse plane; 1g.- 3, it s also wedge- Inasmuch as these two wedge-shaped sections, intersect each other, the connector 5 has at its'center a rectangular-cross section, ken along the i as shown'in Fig. 4.

The construction of the .grid shown in Figs. 1 to 5 will be more clearly understood fromv a reference to Fig.6, which shows one of the. elements of one ofthe mold elements by means of which the grid is cast. It will be understood that a complete mold'section, of

which there are two, is made up of a series of blocks such as that shown in. Fig. 6, these being-mounted on a suitable carrier in checkered arrangement with their corners engaging each other. It will be seen that each block is, basically, a parallelepipedon preferably a cube. In the outerface of each cube, and preferably slightly back from the edges,there are out two pairs of parallel grooves 6, 6 and the corners of the cubes are cut away as indicated at 7, 7. It will be understood that when the two mold. sections are fitted togetherto form a complete mold ITED STATES PATENT OFFICE.

Patented Dec. 2,1919. 7

so arranged. relatively to each other that th apertured arallelograms of one of them I '5, one face of the triangle being outermost. T 4 It will be'observed that the metal of each agonally adjacent parallelograms. -How if i ever, immedlately beneath each point of confor the gridfth e substantially cubical elements of one fit between those of the other grooves6,

6, and the corner notches 7, 7. It will be understood that, in casting, the grooves 6, 6 provide for the bars 4, 4 shown 1n Fags. 1 to 5, and that the notches 7 of four ad acent blocks provide for the transverse connectors 5.

In Figs. 7 to 10 I have shown an alternate form of grid which is especially adapted for use when a relatively. thin grid can be employed. In practice, I have found it deslrable to use the thicker grid shown in Figs. 1 to 5 for the positive plate of the battery and to use the thinner grid shown in Figs. 7 to 10 on the front side being indicated by a in Fig. 7 and the other parallelograms on the front side being indicated y b The construction differs from that of Figs. 1 to 5 chiefly by the omission of two of the bars from each of the parallelo rams b. It will be observed that in each 0 the parallelograms b there are provided on the front side of the plate two bars 4 which intersect each'other, instead of four bars as in the other construction; and thatin each of the non-opposite parallelograms on the backside of the plate there are vprovided' two bars 4" which intersect each other," instead of, four bars as in the other construe tions Connectors ,5"'are provided between the two side parts 'o f-the grid, these belng similar to the connectors 5 of the other construction. It will be. observed that there are a thus doing double duty. By my construcnumber of points of, intersection at which there are bars on but one sideof the grid. At these points there-are provided projections 5' which extend entlrely across the grid and are similar to the'connectors 5*. Like the connectors, they vary in cross section throughouttheir length. One of them is shown in perspective in Fig. 10.

I am aware that it has been heretofore proposed to provide battery grids with separated side parts and transverse connectors between them. However, I believe myself to have been -the first to position the connectors at the corners of the parallelograms or rectangles, thus, making but a small number of c'onnectorsnecessary. With the arrangement which I have shown it will be observed that eachconnector serves to support 7 the corners of two barred parallelograms,

tion I have provided an extremely large volume for thereception of paste and have at the same time maintained the strength of the grid and have provided a large surface i'shaped that the paste is firmly area ofmetal. Each alternate parellelogram at each side of the grid is entirely cut awa and the space thus provided extends entire y through to the other side of the grid, except for the small space occupied by the bars 4, 4 and parts of the connectors 5, 5. at the said 7 opposite side. Therefore, the space available nectors not only gives them agreat surface area but also enables them to firmly hold the 1 paste. As stated, each of the connectors varies in cross section from one side of the grid to the other,and therefore there is no possibility for the paste, after hardening, to

slide longitudinally of the connector.

In the construction shown in Figs. 7 to 10 the amount of space available is even greater,

7 relatively, than in the construction shown in Figs. 1 to 5; As stated, this form of grid is especially adapted to form a negative battery plate, as with a negative plate there is less tendency for the paste to become loos5 ened. On each-surface there are relatively large areas without extended metallic connections, but these are firmly held in place by the transverse members 5 which areso; gripped after? it once hardens around them. e

,What I claim is:

1. A battery grid having in each side? parallelogrammic apertures in checkered arrangement with their corners coinciding, the apertures in one side. being out of trans-. verse register with those of the other side. a

2. A battery grid having substantially parallelepipedonal spaces extending from one side to the other, the said spaces being in checkered arrangement with their corners coinciding and being unobstructed except at theircorners and at points immediately adjacent the second said side of the grid.

3. A battery grid having substantially parallelepipedonal spaces extending from one side to the other, the said spaces being in checkered arrangement with their corners coinciding and being unobstructed except at their corners and at points immediately adjacent the second said side of the grid, and I having other substantially parallelepipedonal spaces extending from the second said side to the first said side, the-said spaces be- 1ng unobstructed exceptv at their corners and at points immediately adjacent the first said side.

4. A battery grid" having substantially i grammicly arranged parallelepipedonal spaces extending from one side to the other, the said spaces being in checkered arrangement with their corners coinciding, and having other substantially spaces at the first said side of the grids, the

said spaces being otherwise unobstructed except at their corners.

5. A battery grid having substantially parallelepipedonal spaces extending from one side to the other, the said spaces being in checkered arrangement with their corners coinciding, and having other substantially parallelepipedonal spaces extending from the second said side to the first said side, the said grid comprising bars obstructing the first said spaces at the second said side of the grid and bars obstructing the second said spaces at the first said side of the grids each of the said bars being triangular in cross section with one face outermost, the said spaces being otherwise unobstructed except at their corners.

6. A battery grid having substantially parallelepipedonal spaces extending from one side to the other, the said spaces being in checkered arrangement with their corners coinciding, and having other substantially parallelepipedonal spaces extending from the second said side to the first said side, the said grid comprising four parallelobars obstructing each of the first said spaces at the second said side of the grid, four parallelogrammicly arranged bars obstructing each of the second said spaces at the first said side of the grids, and transverse connectors with the first said bars and the second said bars at the corners of the said spaces, the said spaces being unobstructed except for the said bars and connectors.

7. A battery grid formed with two similar separated side parts, each divided into parallelograms in checkered arrangement with their corners coinciding, each alternate parallelogram being in the form of an entirely unobstructed aperture, and the apertured parallelograms of the two side parts being out of transverse register with each other.

8. A battery grid'formed with two similar separated side parts, each divided into arallelograms in checkered arrangement with their corners coinciding and each having two pairs of parallel bars at angles to each other in each alternate parallelogram and having each other parallelogram in the form of an entirely unobstructed aperture, the barred parallelograms of one side part being respectively opposite the apertured parallelograms of the other side part.

9. A battery grid formed with two similar separated side parts, each divided into parallelograms in checkered arrangement with their corners coinciding and each having two pairs of parallel bars at angles to each other in each alternate parallelogram and Spaced from the edges thereof and having each other parallelogram in the form of an entirely unobstructed aperture, the barred parallelograms of one side part being respectively opposite the apertured parallelograms of the other side part.

10. A battery grid formed with two similar separated side parts, each divided into parallelograms in checkered arrangement with their corners coinciding and each having two pairs of parallel bars at angles to each other in each alternate parallelogram and having each other parallelogram in the form of an entirely unobstructed aperture, the barred parallelograms of one side part being respectively opposite the apertured parallelograms of the other side part, and transverse connectors between the two side parts positioned at the corners of the barred parallelograms.

11. A battery grid formed with two similar separated side parts, each divided into parallelograms in checkered arrangement with their corners coinciding, each alternate parallelogram being in the form of an entirely unobstructed aperture, and the apertured parallelograms of the two side parts being out of transverse register with each other, and transverse connectors between the two side parts positioned adjacent the corners of the parallelograms and each varying in cross section from one side part to the other. 

